body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 800px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: #2c3e50;
    margin-bottom: 5px;
}

p {
    color: #7f8c8d;
}

.controls {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

select, input, button {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1em;
    box-sizing: border-box; 
    min-width: 0; 
}

select, input {
    flex-grow: 1;
}

button {
    background-color: #3498db;
    color: white;
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #2980b9;
}

#news-container {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); 
}

.article-card {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    transition: transform 0.2s;
    border-left: 5px solid #3498db;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.article-card h3 {
    margin-top: 0;
    margin-bottom: 10px;
}

.article-card h3 a {
    color: #2c3e50;
    text-decoration: none;
}

.article-card h3 a:hover {
    color: #3498db;
}

.meta {
    font-size: 0.85em;
    color: #95a5a6;
    margin-bottom: 15px;
}

.description {
    line-height: 1.6;
}

.hidden {
    display: none;
}

#loading {
    text-align: center;
    font-size: 1.2em;
    color: #7f8c8d;
    margin: 20px 0;
}

#error-msg {
    background-color: #fee;
    color: #c0392b;
    padding: 15px;
    border-radius: 6px;
    text-align: center;
    border: 1px solid #f5c6cb;
}

@media (max-width: 650px) {
    body {
        padding: 10px;
    }
    .container {
        padding: 0; 
    }
    header {
        margin-bottom: 20px;
    }
    h1 {
        font-size: 1.8rem;
    }
    p {
        margin-bottom: 15px;
    }
    
    .controls {
        flex-direction: column;
        gap: 15px;
        padding: 15px;
        margin-bottom: 20px;
    }
    
    select, input, button {
        padding: 10px;
        font-size: 0.95em;
        width: 100%;
    }
    
    #news-container {
        gap: 15px;
        grid-template-columns: 1fr; 
    }

    .article-card {
        padding: 15px;
    }
}

@media (max-width: 400px) {
    h1 {
        font-size: 1.5rem;
    }
    .controls {
        padding: 10px;
    }
    .article-card {
        padding: 12px;
    }
    .article-card h3 {
        font-size: 1em;
    }
}